Commutator for dynamo-electric machines.



P. H. LORING.

GOMMUTATOR FOR DYNAMO ELECTRIC MACHINES,

APPLICATON FILED DBC/231,190?.

Panted 00; 27, 5908.

' T o all whom it may concern:

Nr crearon LONDON, llltliAX ll.

COMMUTATOR FOR DYNAMO-ELECTRIC MACHINES.

Be it known that I, FRnDEnioKIHENnY L'OniNG, a citizen of the United States ol' America, residing at 7 Doughty street, London, England, have invented certain new and useful Improvements in and Relating to Commutators for Dynamo-Electric Machines,

4 of which the following is a specific-ation.

My inventioncomprises a multiple commutator, andconcentric brush-holder studs,

for supporting the brushes therefor.

The object of my invention is to provide two or more segmental commutatore in juxtaposition whidh can be built up and insulated in a substantial manner, without. necessarily occupying appreciably more space than a single commutator of equivalent conducting capacity.

It is a further object of mine to alord a simple and straightforward mechanical construction, which will not be much more eX- pensive to build than a single commutator of usual design.

Figure 1 is a side elevation partly in radial section of my improved commutator construction. Fig. 2 is a sectional view illustrating my improved arrangement of concentric brush-holder studs. Fig. 3 is a vsectional view of a dished plate covered with insulation material.

According to my invention, l provide two or more independent commutators, which V or recess into each other after the manner of a nest of dishes as typically illustrated in Fig. 1. Referringv to this figure,

p the commutator a next to the armature core has the usual slotted ends b or is provided with risers to take the wires d of one winding. The next commutator e has lugs'or slotted portions f on its inner bore which take copper stri s g.) These pass along underneath the st-named commutator, and rise up through peripherical openings h provided in the supportingv shell 't' and are connected to the wires d of the second winding.' An end-platel y clamps the commutators together, somewhat in the usual manner. Mi-

l caniteor other suitable insulation c'is used bets/reen all the V-faces, and the L-strips may be tapedenameled with porcelain, or otherwise suitably insulated, inasmuch as they may besomewhat crowded, in order to make y room torthenvebs l on the shell, which join integrally with the solid V-ring 'm next to the lirrst commutator.

Referring to Fig. 2, the brush-holder-stud Specification ol Letters Patent. Applicatiop filedDecember 31, 1907. Serial No. L108,733.

Patented Oct. 27, 1908.

comprises a solid round rod n. which screws firmly into an insulating` block r preferably of tapering cylindrical exterior. is slipped a mica-nite or insulating tube p. A brass tube g is slipped over the aforesaid tube, and', being threaded at the supporting end, is screwed into an insulating block 0 of practicallythe saine shape as the one for the round solid rod. Any hard and tough insulating material, may be used for thc above Thesel blocks are drawn together with' small steel screws s against corresponding taper surfacesA formed on an arm t which is arranged to admit ol a slight rotational movement by the usual seating u onthe front bearing-bracket w. Bymeans of the above arrangement, two independent brushes `may be insulated from each other' on the ne supporting stud. Suitable nuts' and connectors v are introduced so that terminal wires may be attached to each insulated part.

On this rod My invention is not limited to the detailed construction hereinabove described. For example in some cases it may be preferable to employ grooves shaped dilerently from the il-shaped ones shown.

l am not aware that commutators have ever been assembled closely in the particular manner hereinabove described, side by side, and this feature of my invention affords a more convenient and compact arrangement of parts With the result that standard machines can be more easily converted for instance into variable speed motors or Variable or multi-voltage generators, or machines requiring two commute/tors. In some cases l arr ige the insulation between the commutatois as a lining 0n both sides of a dished steel plate as shown in section in Fig. 3, in

which k is the insulation and y the dished steel reinforcing plate.

What l claim is 1. A commutator device comprising a'supporting shell, a number of independent multiar commutatorearranged side by side coaxially and externally to the said shell, integral projections being formed on the end face of one commutator and entering recesses in the endface of the adjoining commutator, an

eXte sion on said supporting shell havingv perip eral openings therein,`and inner connections from one commutator brought through the said peripheral openings.

2. A commutator device comprising a su pporting shell, two independent multi-har commutatora 'by Sfr im?, er@

ternaly to said supporting shcl, a i projection integral with one communism T, n V-shaped recess in th@ adjoining' commu-- tutor, ilisulntjom materia! between smid Ml shaped surfaces, an extension. on. said'. Sup

orting shel formed integrmy therewith zmd mving peripheral openings therein, inner 4 tric brush hodor supports nsurrted from one anotwr, and insulating' bmfrs im v'fhiv Lm said suppmts ma zratmrhcful, Srirl insulating blocks. being drawn tnwm'd reach whims: against opposite scat-ings; .foune-T in :E Hupporting arm.

45a. Th@ crmpvmt-cn with :i commutatm" dev/Tia@ cmnprising; 15W@ independent multibzrr uon'xmu'mtors arranged sld@ by side e0 @.Ixialy on a common Supporting shell, om comnxutator having a wwhnpedprojectiom joining commu'artor, md insulating muter'a between said wsha )ed surfaces, 01" stationary concentric brush holder supports comprising@ soid. Stud serewcd into an insuatiing Nodi, 'an .nsuaing sleeve thereon, a brush hmmm' rubi: su'atiug vock nowhich the said sleeve .is screwed, a. supporting arm having openings, and means for damping said insulating blocks in Suid openings.

In testinmny Whrmf' have hereunto Soi;

my .han d in nausea presence of two subscribing wit-- FNEDEHU( HENK Y, LOUNU.

fitressas Amm/mmm W. ALLEN. .H D. J'Amxsorm on said. sleeve and rm sccond in 

